Combination knob lock



y 1931- H; L. MUNSON 1,813,813

COMBINATION KNOB LOCK Filed Jan. 18, 1950 INVENTOR. I H I... Munson ATTORNEY.

NBY

Patented July 7, 1931 STATES HENRY L. MULISON, OF FORT WAYNE, INDIANA COMBINATION KNOB LOCK Application filed January 18, 1930. Serial No. 421,614..

The invention relates to combination knob locks and it is directed particularly to such locks adapted for application to desks, cabinets, drawers, automobile transmissions and ignition systems and the like.

The object of the invention is to provide a simple and novel combination of knob and keyiess lock that is efficient and durable.

The invention is illustrated in the accompanying drawings in which Figure 1 is a side elevational View of a device embodying the invention; Fig. 2 a cross section on line 2-2 of Fig. 1; Fig. 3 a plan view of the shaft; Fig. 4 a cross-section on line 44 of Fig. 3; Fig. 5 an elevational view of one of the tumbler engaging members; Fig. 6 an elevational view of one of the rollers for actuating the tumbler engaging members; Fig. 7 a longitudinal crosssection of a modified form of the locking members; Fig. 8 a plan view of the shaft with the locking levers attached thereto; Fig. 9 an elevational view of one of the lever actuating disks and Fig. 10 a cross-section on line 10-10 of Fig. 6.

Referring to the illustrative embodiment of the invention 1 represents a base adapted to be attached to a door or drawer or other object to be locked. A shaft or bolt 2 is revolubly mounted in the base and extends through the same. A member 3 may be attached to the bolt 2 which will serve as a locking member or it may operate a bolt or other part of a lock. In Fig. 3 longitudinal slots 4 are formed in the shaft and receive rollers, two of which, indicated by characters 5 and 6, are shown, but any selected number may be used. A gear 7 is formed on the outer end of each roller and these gears respectively engage internal gears formed on the threaded collars 8, 9 by which collars the rollers may be independently rotated. A series of notches or depressions 10 is formed in the periphery of each roller adjacent the inner end thereof and each notch is adapted to receive one of the tumblers 11, 12 that are mounted in the base 1 and opposed by the springs 13 which tend to move the tumblers inwardly. A lock nut 14 is threaded on the shaft 2 and is adapted, when rotated, to frictionally engage the collar 8 and lock it to the collar 9, the latter collar being thereby locked to the collar 16. A knob 15 is secured to the outer end of the shaft, and a collar 16 is pinned to the shaft and assures retention of the rollers 5, 6 in the bolt 2.

v In the locking position of the parts each tumbler is engaged in one of the recesses in the rollers. By rotating the collars 8, 9, separately, the tumblers are eventually moved out of the recesses by the rollers into the base so that the shaft is free to be rotated by the knob for releasing the bolt or other locking member, provided the rotation of each roller ceases while the tumbler is resting on the periphery of the roller between two depressions 10. By adjusting the lock nut 14 the collars 8, 9 may be held against rotation in order to hold the device in unlocked condition.

In Figs. 7 8 and 9 I illustrate a modified form of the invention in which the base 17, corresponding to base 1 is centrally apertured to receive the bolt 18. Recesses 19.75 communicate with the central aperture and are adapted respectively to receive the inner ends of two levers 20, 21 that are pivotally mounted at 22 in a slot 23 formed in the bolt 18. The pivot 22 extends through the so bolt 18 and through the collar 24 that is mounted on the bolt. Springs 25 bear on the levers respectively and tend to rock the levers so that their inner ends will disengage from the recesses 19 and thereby unlock the bolt. The outer ends of the levers extend respectively into the collars 26, 27 which are revolubly mounted on the bolt and each has a cam 28 formed therein into which the outer ends of the levers will move when the collars are rotated. The cams therefore cause the levers to rock to cause their inner ends to move into the recesses 19 and thereby lock the bolt 18. When the levers are released the bolt may be rotated by the knob to release the locking member attached to the inner end of the bolt. A look nut 29, similar to nut 14 is mounted on the bolt 18 and serves to lock the collars 26, 27 against rotation.

The device is adaptable to many uses such as for doors, drawers, chests, automobile transmissions and ignition systems and the like and it may be formed various Ways, the constructions illustrated being illustrative only.

l/Vhat I claim is:

1. A device of the class described comprising a base adapted to be fixed, a revoluble bolt extending through the base, a knob on one end of the bolt, a locking member con-' nected to the opposite end of the bolt and means to look the bolt to the base including a plurality of tumblers in the base, movable members mounted in the bolt and adapted to engage the tumblers and revoluble members on the bolt engaging the movable members and adapted, to be selectively operated to move the movable members.

:2. A device of the class described comprising a base adapted to be fixed, a revoluble bolt extending through the base, a locking member on one end of the bolt and means to lock the bolt to the base including a plurality of movable members :mounted in the bolt, means in the base adapted to be engaged by the movable members and revoluble members on the bolt engaging the movable members respectively and adapted" to be selectively operated to move said movable memers.

A device of the class-described comprising a base adapted to be fixed, a revoluble bolt extending through the base, a locking member on one end of the bolt, and means to lock the bolt to the base including a plurality of tumblers in the base, rollers mounted in the bolt and adapted to engage the tumblers respectively and revoluble members 0n the bolt engaging the vrollers and adapted to be selectivelv operated to rotate the rollers.

In Witness whereof I have hereunto subscribed my name.

HENRY L. MUNSON. 

